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Computer Psych Assessment > Special Abilities Test Software

PERSEVERATION TEST - PERSEV - 7 YEAR LICENSE

Model 64053

Perseveration Test - PERSEV - 7 Year License
 
   
 

DETAILS

SYSTEM OVERVIEW

The Schuhfried VTS enables computer-assisted application of a large number of highly diverse psycho-diagnostic tests and measuring procedures. In developing the system much emphasis was placed on transparent structure and largely uniform design. It is therefore simple to operate and easy to understand and does not require any special computer skills.

The VTS basic module is required for administration of any of the available tests.

The Schuhfried VTS supports the administration of both single tests and test batteries. Many of the single tests are available in different test versions. These test versions may differ, for example, in terms of test duration or difficulty or may be parallel forms. They are characterized by different parameters reflecting specific test requirements. They have been designed for administration to a specific population (e.g. psychiatric patients, children, etc.) or for special measuring purposes (e.g. repeated measurements). Test batteries are compiled from the available single tests and test versions.

APPLICATION

Determination of perseverance tendency in children and adults, especially for diagnostic purposes in clinical subjects and use in rehabilitation and research.

THEORETICAL BACKGROUND

In the literature, perseverance is generally understood as an inappropriate persistence of cognitive processes and patterns of behavior. Instead of variability, flexibility and adaptability subjects show resistance to change and rigidity. Motor perseverance or "stereotyped behavior" is characterised by a large measure of repetition of specific action sequences. Most theories understand perseverance as an excitation phenomenon following mental and central nervous processes. The existence of perseverance tendencies has been demonstrated by Mittenecker by means of a pointing test. Test subjects were instructed to point a pen at the figures 1 to 10 in a completely random manner, not keeping to any order at all. The extent of repetitive tendency in an individual was then determined by methods derived from information theory. The present Perseverance Test is a computer-assisted implementation of Mittenecker's pointing test.

ADMINISTRATION

Nine large circles are displayed on the screen. As in Mittenecker's set-up, 64 "bleeps" per minute are output in addition. The subject's task is to point at the circles with the "lightpen", in as random a sequence as possible, to the rhythm of the acoustic signals. The test includes an instruction phase and a practice phase with feedback. After 210 entries have been made the programme signals the end of the test.

TEST FORMS

One test version is available.

SCORING

The following quantities, derived from information theory, are computed:

  • "Redundancy of the first order" (R1) as an indicator of relative preference for specific circles and
  • "Redundancy of the second order" (R2) as a measure of the preference for specific dual combinations (after circle X the lightpen tends to go to circle Y). The 81 combinations that are possible cannot be consciously controlled by the subject. The redundancy measure R2 is a particularly good indicator of perseverance tendencies.
  • Control variables: Number of omissions and multiple reactions in the interval between two bleeps and reaction time.

RELIABILITY

For "Redundancy of the first order" split-half reliability (odd-even) is between r = .86 and r = .91. For the variable "Redundancy of the second order" reliabilities determined by the same method are between r = .81 and r = .87.

VALIDITY

A number of studies with the pointing experiment showed a significantly higher perseveration for clinical respondent groups in the following ascending order: epileptics, respondents with organic brain dysfunctions or damages, depressive patients, neurotics and schizophrenics. These results were confirmed when applying the computerized Perseveration Test to patients with cranio-cerebral injuries. Additionally it is deemed evident, that rigidity and inflexibility of cognitive processes result in a greater repetition tendency of certain courses of action. In a study by Stoffers et al. (2001) it is reported, that when comparing two respondent groups with early signs of Morbus Parkinson (of which one groups was treated with medical drugs and the other one not) by the Perseveration Test, a marked reduction in the capacity to create patterns at random could be found in both groups.

NORMS

Norms of N=417 healthy persons between the ages of 6 to 95 years are available. Additionally, test results were compared to age-specific subsamples.

TESTING TIME

About 5 Minutes

ACCESSORIES

REQUIRED ACCESSORIES

Light Pen Interface Image

Light Pen Interface
Model 64021

Light pen interface for any standard VGA display.

Set of Light Pens Image

Set of Light Pens
Model 64022

Set of light pens for use with VTS tests.

Schuhfried Vienna Test System Image

Schuhfried Vienna Test System
Model 64032

The Schuhfried VTS enables computer-assisted application of a large number of highly diverse psycho-diagnostic tests and measuring procedures.

RELATED PRODUCTS

Perseveration Test - PERSEV - 50 Administration License Image

Perseveration Test - PERSEV - 50 Administration License
Model 64053-50

Determination of perseverance tendency in children and adults, especially for diagnostic purposes in clinical subjects and use in rehabilitation and research.

CONTACT US

Lafayette Instrument Company
3700 Sagamore Pkwy N
Lafayette, IN 47904

Phone: (765) 423-1505
Fax: (765) 423-4111
info@lafayetteinstrument.com

 

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CONTACT US

Lafayette Instrument Company
3700 Sagamore Pkwy N
Lafayette, IN 47904

Phone: (765) 423-1505
Fax: (765) 423-4111

info@lafayetteinstrument.com

Copyright © 2009 - 2017 Lafayette Instrument Company. All Rights Reserved.